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MFJs tunable super DSP filter automatically eliminates heterodyne, reduces noise and interference simultaneously on SSB, AM, CW, packet, AMTOR, PACTOR, RTTY, SSTV, WeFAX, FAX, weak signal VHF, EME, satellite -- nearly any mode. You get MFJs tunable FIR linear phase filters that minimize ringing, prevent data errors and have "brick wall" filter response with up to 57 dB attenuation 75 Hz away. Only MFJ gives you 5 tunable DSP filters. You can tune each lowpass, highpass, notch, and bandpass filter including optimized SSB and CW filters. You can vary the bandwidth to eliminate interference. Only MFJ gives you 5 factory pre-set filters and 10 programmable pre-set filters that you can customize. Instantly remove QRM with the turn of a switch! You get MFJs automatic notch that finds and eliminates multiple heterodyne. You get MFJs adaptive noise reduction. It silences background noise and QRN so much that SSB sound like local FM. The automatic notch and adaptive noise reduction can be used with all relevant tunable pre-set filters. Automatic gain control (AGC) keeps audio level constant during signal fade. Automatic notch filter MFJs automatic notch filter searches for and eliminates multiple heterodyne in milliseconds. Its so fast, that even interfering CW and RTTY signals are eliminates. With up to 50 dB attenuation, youll copy stations otherwise masked by heterodyne. Voice signals arent degraded because the notch is extremely narrow. Turn on automatic notch and youll never hear unwanted heterodyne or tuner-uppers. You can selectively remove unwanted tones using the two manually tunable notch filters -- an MFJ exclusive. Knock out unwanted CW stations while youre on CW. Adaptive noise Reduction Noise reduction silences background noise, reduces fatigue and makes signals readable. Noise reduction works in all filter modes and on all random noise -- white noise, static, impulse, ignition noise, power line noise, hiss.